Evidence map›Paper›PMID 37020305›Full record

ArticleJournal of orthopaedic surgery and research2023

Practical considerations for determination of scapular internal rotation and its relevance in reverse total shoulder arthroplasty planning.

Paul Siegert, Dominik Meraner, Alexandra Pokorny-Olsen, Doruk Akgün, Gundobert Korn, Christian Albrecht, Jochen G Hofstaetter, Philipp Moroder

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of orthopaedic surgery and research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
1.9field-weighted citation impact, top 15% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed, 6 citations in OpenAlex.

  1. The association between scapular orientation and spinopelvic parameters.Journal of shoulder and elbow arthroplasty · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 3 countries.

Paul Siegert1st Orthopaedic Department, Orthopaedic Hospital Speising, Speisinger Str. 109, 1130, Vienna, Austria. paul.siegert@oss.at.
Dominik Meraner1st Orthopaedic Department, Orthopaedic Hospital Speising, Speisinger Str. 109, 1130, Vienna, Austria.
Alexandra Pokorny-Olsen1st Orthopaedic Department, Orthopaedic Hospital Speising, Speisinger Str. 109, 1130, Vienna, Austria.
Doruk AkgünDepartment for Shoulder and Elbow Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany.
Gundobert KornDepartment of Orthopaedic and Traumasurgery, Paracelsus Medical University, Salzburg, Austria.
Christian Albrecht1st Orthopaedic Department, Orthopaedic Hospital Speising, Speisinger Str. 109, 1130, Vienna, Austria.
Jochen G HofstaetterMichael Ogon Laboratory for Orthopaedic Research, Orthopaedic Hospital Speising, Vienna, Austria.
Philipp MoroderDepartment of Shoulder and Elbow Surgery, Schulthess Clinic, Zurich, Switzerland.
Orthopaedic Hospital Speising · ATCharité - Universitätsmedizin Berlin · DEParacelsus Medical University · ATSchulthess-Klinik · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundScapulothoracic orientation, especially scapular internal rotation (SIR) may influence range of motion in reverse total shoulder arthroplasty (RTSA) and is subjected to body posture. Clinical measurements of SIR rely on apical bony landmarks, which depend on changes in scapulothoracic orientation, while radiographic measurements are often limited by the restricted field of view (FOV) in CT scans. Therefore, the goal of this study was (1) to determine whether the use of CT scans with a limited FOV to measure SIR is reliable and (2) if a clinical measurement could be a valuable alternative.

methodsThis anatomical study analyzed the whole-body CT scans of 100 shoulders in 50 patients (32 male and 18 female) with a mean age of 61.2 ± 20.1 years (range 18; 91). (1) CT scans were rendered into 3D models and SIR was determined as previously described. Results were compared to measurements taken in 2D CT scans with a limited FOV. (2) Three apical bony landmarks were defined: (the angulus acromii (AA), the midpoint between the AA and the coracoid process tip (C) and the acromioclavicular (AC) joint. The scapular axis was determined connecting the trigonum scapulae with these landmarks and referenced to the glenoid center. The measurements were repeated with 0°, 10°, 20°, 30° and 40° anterior scapular tilt.

resultsMean SIR was 44.8° ± 5.9° and 45.6° ± 6.6° in the 3D and 2D model, respectively (p < 0.371). Mean difference between the measurements was 0.8° ± 2.5° with a maximum of 10.5°. Midpoint AA/C showed no significant difference to the scapular axis at 0° (p = 0.203) as did the AC-joint at 10° anterior scapular tilt (p = 0.949). All other points showed a significant difference from the scapular axis at all degrees of tilt.

conclusion2D CT scans are reliable to determine SIR, even if the spine is not depicted. Clinical measurements using apical superficial scapula landmarks are a possible alternative; however, anterior tilt influenced by posture alters measured SIR.

Indexed as

Arthroplasty, Replacement, ShoulderShoulder JointAdolescentArthroplastyBiomechanical PhenomenaFemaleHumansMalePostureRange of Motion, ArticularScapulaShoulderPosture typesReverse total shoulder arthroplastyScapular internal rotationScapulothoracic orientation

Identifiers

PMID37020305
PMCPMC10077691
OpenAlexW4362607838

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.